ADO 更新記錄
我們可以使用 SQL UPDATE 命令來更新資料庫中表中的記錄。
更新表中的記錄
我們想更新 Northwind 資料庫中 Customers 表中的記錄。我們首先建立一個列出 Customers 表中所有記錄的表。
<html>
<body>
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"
set rs=Server.CreateObject("ADODB.Recordset")
rs.open "SELECT * FROM customers",conn
%>
<h2>列出資料庫</h2>
<table border="1" width="100%">
<tr>
<%
for each x in rs.Fields
response.write("<th>" & ucase(x.name) & "</th>")
next
%>
</tr>
<% do until rs.EOF %>
<tr>
<form method="post" action="demo_update.asp">
<%
for each x in rs.Fields
if lcase(x.name)="customerid" then%>
<td>
<input type="submit" name="customerID" value="<%=x.value%>">
</td>
<%else%>
<td><%Response.Write(x.value)%></td>
<%end if
next
%>
</form>
<%rs.MoveNext%>
</tr>
<%
迴圈
conn.close
%>
</table>
</body>
</html>
如果使用者點選“customerID”列中的按鈕，他或她將被帶到名為“demo_update.asp”的新檔案。“demo_update.asp”檔案包含如何根據資料庫表中一條記錄的欄位建立輸入欄位的原始碼。它還包含一個“更新記錄”按鈕，將儲存您的更改。
<html>
<body>
<h2>更新記錄</h2>
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"
cid=Request.Form("customerID")
if Request.form("companyname")="" then
set rs=Server.CreateObject("ADODB.Recordset")
rs.open "SELECT * FROM customers WHERE customerID='" & cid & "'",conn
%>
<form method="post" action="demo_update.asp">
<table>
<%for each x in rs.Fields%>
<tr>
<td><%=x.name%></td>
<td><input name="<%=x.name%>" value="<%=x.value%>"></td>
<%next%>
</tr>
</table>
<br><br>
<input type="submit" value="更新記錄">
</form>
<%
else
sql="UPDATE customers SET "
sql=sql & "companyname='" & Request.Form("companyname") & "',"
sql=sql & "contactname='" & Request.Form("contactname") & "',"
sql=sql & "address='" & Request.Form("address") & "',"
sql=sql & "city='" & Request.Form("city") & "',"
sql=sql & "postalcode='" & Request.Form("postalcode") & "',"
sql=sql & "country='" & Request.Form("country") & "'"
sql=sql & " WHERE customerID='" & cid & "'"
on error resume next
conn.Execute sql
if err<>0 then
response.write("沒有更新許可權！")
else
response.write("記錄 " & cid & " 已更新！")
end if
end if
conn.close
%>
</body>
</html>
